US6919925B2 - Imaging apparatus and video camera, and method of reproducing recorded information performed by the imaging apparatus or the video camera - Google Patents

Imaging apparatus and video camera, and method of reproducing recorded information performed by the imaging apparatus or the video camera Download PDF

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Publication number
US6919925B2
US6919925B2 US10/118,836 US11883602A US6919925B2 US 6919925 B2 US6919925 B2 US 6919925B2 US 11883602 A US11883602 A US 11883602A US 6919925 B2 US6919925 B2 US 6919925B2
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Prior art keywords
image
image signal
recording
recorded
reproducing
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US10/118,836
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US20020149682A1 (en
Inventor
Toshimichi Kudo
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Canon Inc
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Canon Inc
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Assigned to CANON KABUSHIKI KAISHA reassignment CANON KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KUDO, TOSHIMICHI
Publication of US20020149682A1 publication Critical patent/US20020149682A1/en
Priority to US11/148,889 priority Critical patent/US20050225652A1/en
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Priority to US12/731,671 priority patent/US8218056B2/en
Priority to US13/491,128 priority patent/US8520119B2/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/77—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera
    • H04N5/772—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera the recording apparatus and the television camera being placed in the same enclosure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/53—Constructional details of electronic viewfinders, e.g. rotatable or detachable
    • H04N23/531—Constructional details of electronic viewfinders, e.g. rotatable or detachable being rotatable or detachable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders
    • H04N23/633—Control of cameras or camera modules by using electronic viewfinders for displaying additional information relating to control or operation of the camera
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/781—Television signal recording using magnetic recording on disks or drums
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/84—Television signal recording using optical recording
    • H04N5/85—Television signal recording using optical recording on discs or drums
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction

Definitions

  • the present invention relates to an imaging apparatus and a video camera, and a method of reproducing recorded information performed by the imaging apparatus or the video camera, and more particularly, to an imaging apparatus and a video camera that record an information signal on a recording medium as well as reproduce the information signal as recorded information, and a method of reproducing recorded information performed by the imaging apparatus or the video camera.
  • the viewfinder includes optical types and electronic types (hereinafter referred to as “EVF”). Also, if a video camera having an EVF is employed, a reproduced image can be viewed on the main body of the camera only by displaying the reproduced image reproduced from a recording medium on the EVF. Since such viewfinders are adapted to be looked into, the image cannot be shared by a plurality of persons at a time.
  • EVF optical types and electronic types
  • Japanese Laid-open Patent Publication (Kokai) No. 8-9204 have been gaining in popularity.
  • Japanese Laid-open Patent Publication (Kokai) No. 8-9204 also describes switching means for automatically turning off a liquid crystal panel and turning on an EVF when the liquid crystal panel is closed and automatically turning on the liquid crystal panel and turning off the EVF when the liquid crystal panel is opened.
  • VCRs video cassette recorders
  • HDD hard disk drive
  • an imaging apparatus comprising image pickup means, recording means for recording a first image signal obtained by the image pickup means on a randomly accessible recording medium, reproducing means capable of reproducing a second image signal recorded at a random location on the recording medium while the first image signal is being recorded on the recording medium by the recording means, first display means, second display means, and control means for controlling the recording means and the reproducing means such that the second image signal recorded at a random location on the recording medium is reproduced while the first image signal obtained by the image pickup means is being recorded, the control means further controlling the first display means and the second display means such that one of the first display means and the second display means displays a first image according to the first image signal obtained by the image pickup means and the other displays a second image according to the second image signal reproduced by the reproducing means.
  • the first display means comprises one of an electronic viewfinder and a liquid crystal display means foldably attached to the main body of the apparatus, and the second display means comprises the other.
  • control means controls the liquid crystal display means to display the second image while controlling the electronic viewfinder to display the first image.
  • the imaging apparatus further comprises movement detecting means for detecting whether the liquid crystal display means has been moved into a viewing position in which an image displayed by the liquid crystal display means is visible, wherein the control means is responsive to the movement detecting means detecting that the liquid crystal display means has not been moved into the viewing position, for inhibiting the second image from being displayed while the first image signal is being recorded.
  • the imaging apparatus further comprises movement detecting means for detecting whether the liquid crystal display means has been moved into a viewing position in which an image displayed by the liquid crystal display means is visible, wherein the control means is responsive to the movement detecting means detecting that the liquid crystal display means has not been moved into the viewing position, for inhibiting the reproducing means from reproducing the second image signal while the first image signal is being recorded.
  • the imaging apparatus further comprises selecting means for selecting an image signal to be displayed on the first display means and an image signal to be displayed on the second display means out of the first image signal obtained by the image pickup means and the second image signal reproduced by the reproducing means.
  • control means is responsive to an instruction to start reproduction while the first image signal obtained by the image pickup means is being recorded on the recording medium, for controlling the first display means and the second display means such that an image to be displayed on the first display means is switched from the first image to the second image and the first image is displayed on the second display means.
  • control means controls the reproducing means to automatically stop reproduction of the second image signal recorded on the recording medium a predetermined period of time after issuance of the instruction to start reproduction.
  • control means is responsive to an instruction to stop reproduction of the second image signal recorded on the recording medium, for controlling the first display means and the second display means such that the second display means stops displaying the first image and an image to be displayed on the second display means is switched from the second image to the first image.
  • the first aspect of the present invention also provides a method of reproducing recorded information, executed by an imaging apparatus comprising image pickup means, recording means for recording a first image signal obtained by the image pickup means on a randomly accessible recording medium, reproducing means capable of reproducing a second image signal recorded at a random location on the recording medium while the first image signal is being recorded on the recording medium by the recording means, first display means, and second display means, the method comprising the steps of controlling the recording means and the reproducing means such that the second image signal recorded at a random location on the recording medium is reproduced while the first image signal obtained by the image pickup means is being recorded, and controlling the first display means and the second display means such that one of the first display means and the second display means displays a first image according to the first image signal obtained by the image pickup means and the other displays a second image according to the second image signal reproduced by the reproducing means.
  • an imaging apparatus comprising image pickup means, a microphone for capturing audio information, recording means for recording a first image signal obtained by the image pickup means and audio information captured by the microphone on a randomly accessible recording medium, reproducing means capable of reproducing a second image signal and audio information corresponding to the second image signal recorded at a random location on the recording medium while the first image signal is being recorded on the recording medium by the recording means, audio output means for externally outputting the audio information reproduced by the reproducing means, and control means for controlling the audio output means to inhibit the audio information reproduced by the reproducing means from being externally outputted while the first image signal is being recorded by the recording means.
  • the audio output means comprises a speaker for outputting the reproduced audio information, and an external output terminal for externally outputting the audio information
  • the control means controls the audio output means to inhibit the audio information reproduced by the reproducing means from being outputted by the speaker while the first image signal is being recorded by the recording means and to permit the reproduced audio information to be outputted from the external output terminal.
  • the second aspect of the present invention also provides a method of reproducing recorded information executed by an imaging apparatus comprising image pickup means, a microphone for capturing audio information, recording means for recording a first image signal obtained by the image pickup means and audio information captured by the microphone on a randomly accessible recording medium, reproducing means capable of reproducing a second image signal and audio information corresponding to the second image signal recorded at a random location on the recording medium while the first image signal is being recorded on the recording medium by the recording means, and audio output means for externally outputting the audio information reproduced by the reproducing means, the method comprising the step of controlling the audio output means to inhibit the audio information reproduced by the reproducing means from being externally outputted while the first image signal is being recorded by the recording means.
  • a video camera comprising image pickup means, recording means for recording a first image signal obtained by the image pickup means on a randomly accessible recording medium, reproducing means for reproducing a second image signal recorded on the recording medium, recording start instructing means for instructing start of recording the first image signal obtained by the image pickup means on the recording medium, and control means responsive to an instruction to start recording from the recording start instructing means during reproduction of the second image signal recorded on the recording medium by the reproducing means, for controlling the recording means and the reproducing means such that recording of the first image signal obtained by the image pickup means is started by the recording means while the reproduction by the reproducing means is continued.
  • the video camera further comprises reproduction start instructing means for instructing start of reproduction of the second image signal recorded on the recording medium, wherein the control means is responsive to an instruction to start reproduction by the reproduction start instructing means during recording of the second image signal, for controlling the recording means and the reproducing means such that the second image signal recorded a predetermined period of time before is reproduced from the recording medium while recording of the first image signal by the recording means is continued.
  • reproduction start instructing means for instructing start of reproduction of the second image signal recorded on the recording medium
  • control means is responsive to an instruction to start reproduction by the reproduction start instructing means during recording of the second image signal, for controlling the recording means and the reproducing means such that the second image signal recorded a predetermined period of time before is reproduced from the recording medium while recording of the first image signal by the recording means is continued.
  • the video camera according to the third aspect further comprises first display means, and second display means, and wherein the control means controls the first display means and the second display means such that one of the first display means and the second display means displays a first image according to the first image signal obtained by the image pickup means and the other displays a second image according to the second image signal reproduced by the reproducing means.
  • the first display means comprises one of an electronic viewfinder and a liquid crystal display means foldably attached to the main body of the video camera, and the second display means comprises the other.
  • control means controls the liquid display means to display an image according to the second image signal reproduced by the reproducing means while controlling the electronic view finder to display an image according to the first image signal obtained by the image pickup means.
  • the video camera further comprises a microphone for capturing audio information, and audio output means for externally outputting the audio information
  • the recording means records the audio information captured by the microphone on the recording medium in correspondence with the first image signal
  • the reproducing means reproduces the audio information recorded on the recording medium together with the second image signal corresponding thereto
  • the control means controls the audio output means to inhibit the audio information reproduced by the reproducing means from being externally outputted while the first image signal is being recorded by the recording means.
  • the third aspect of the present invention also provides a method of reproducing recorded information executed by a video camera comprising image pickup means, recording means for recording a first image signal obtained by the image pickup means on a randomly accessible recording medium, reproducing means for reproducing a second image signal recorded on the recording medium, and recording start instructing means for instructing start of recording the first image signal obtained by the image pickup means on the recording medium, the method comprising the step of controlling the recording means and the reproducing means such that recording of the first image signal obtained by the image pickup means is started by the recording means while the reproduction by the reproducing means is continued, in response to an instruction to start recording from the recording start instructing means during reproduction of the second image signal recorded on the recording medium by the reproducing means.
  • the recording means and the reproducing means are controlled such that an image signal recorded at a random location on a recording medium is reproduced while an image signal obtained by the image pickup means, and further, the first display means and the second display means are controlled such that one of the first display means and the second display means displays a first image according to the first image signal obtained by the image pickup means and the other displays a second image according to the second image signal reproduced by the reproducing means.
  • the audio output means is controlled to inhibit the audio information reproduced by the reproducing means from being externally outputted while the first image signal is being recorded by the recording means.
  • the recording means and the reproducing means are controlled such that recording of the first image signal obtained by the image pickup means is started by the recording means while the reproduction by the reproducing means is continued, in response to an instruction to start recording from the recording start instructing means during reproduction of the second image signal recorded on the recording medium by the reproducing means.
  • FIG. 1 is a block diagram showing the internal configuration of a video camera according to a first embodiment of the present invention
  • FIG. 2 is a perspective view showing the appearance of the video camera in FIG. 1 ;
  • FIG. 3 is a fragmentary view showing a mode dial provided on the video camera in FIG. 2 ;
  • FIG. 4 is a diagram showing an example of an index screen displayed on a liquid crystal panel of the video camera 100 in FIG. 1 ;
  • FIG. 5 is a flow chart showing a procedure carried out in camera mode in the video camera in FIG. 1 ;
  • FIG. 6 is a flow chart showing a continued part of the flow chart in FIG. 5 ;
  • FIG. 7 is a block diagram showing the internal configuration of a video camera according to a second embodiment of the present invention.
  • FIG. 8 is a diagram showing a state transition of display control in a case where a reproduction request is made in camera mode in the video camera in FIG. 7 ;
  • FIG. 9 is a flow chart showing a procedure carried out in camera mode in the video camera in FIG. 7 ;
  • FIG. 10 is a flow chart showing a procedure carried out in reproduction mode in a video camera according to a third embodiment of the present invention.
  • FIG. 1 is a block diagram showing the internal configuration of a video camera 100 according to a first embodiment of the present invention
  • FIG. 2 is a perspective view showing the appearance of the video camera 100 in FIG. 1
  • FIG. 3 is a fragmentary view showing a mode dial provided on the video camera 100 in FIG. 2
  • FIG. 4 is an example of an index screen displayed on a liquid crystal panel of the video camera 100 shown in FIG. 1 .
  • the video camera 100 has a main body 201 in which is accommodated a randomly accessible recording medium (not shown) such as a hard disk or a magnetic optical disk.
  • the video camera 100 records information such as image data compressed and coded according to MPEG (Moving Picture Experts Group) or audio data in the recording medium, or reproduces recorded information thus stored in the recording media.
  • MPEG Motion Picture Experts Group
  • a magnetic optical disk is used as the recording medium.
  • the main body of the video camera 201 includes an image pickup section 202 for capturing an object image, a microphone 203 for collecting sound during shooting, an EVF 204 for viewing an object image taken, a trigger switch 205 which is an operating switch for instructing start or stop of shooting, a mode dial 206 for setting a mode, a group of operating switches 207 including keys for operation of a reproduction system, a menu operation and others, a liquid crystal panel 208 , a speaker 209 , a battery 210 detachable from the main body of the camera 201 , and an external output terminal 213 such as a headphones jack.
  • an image pickup section 202 for capturing an object image
  • a microphone 203 for collecting sound during shooting
  • an EVF 204 for viewing an object image taken
  • a trigger switch 205 which is an operating switch for instructing start or stop of shooting
  • a mode dial 206 for setting a mode
  • a group of operating switches 207 including keys for operation of a reproduction system, a menu operation and others
  • the EVF 204 is an electronic viewfinder which may be turned off by a control, described later.
  • the mode dial 206 is, as illustrated in FIG. 3 , a rotary operating switch on which are indicated operating positions including “PLAYBACK” for setting the video camera 100 in reproduction mode, “CAMERA” for setting the video camera 100 in camera mode, and “OFF” for setting the video camera 100 in off mode.
  • PLAYBACK for setting the video camera 100 in reproduction mode
  • CAMERA for setting the video camera 100 in camera mode
  • OFF for setting the video camera 100 in off mode.
  • a recorded image recorded on a recording medium can not only be reproduced but can also be edited or erased. Also, in the camera mode, shooting can be primarily carried out. In the off mode, the main power supply of the video camera 100 can be switched off.
  • the liquid crystal panel 208 which is attached to the main body of camera 201 , displays an object image such that it can be viewed in the same way as the EVF 204 during shooting, and displays mainly a reproduced recorded image during reproduction.
  • the liquid crystal panel 208 can again be turned off as with the EVF 204 .
  • the liquid crystal panel 208 is constructed such that it can be folded out from the main body of the camera 201 , and is further vertically rotatable when it is in an unfolded or open position.
  • a panel open/closed detection switch 211 For example, in the liquid crystal panel 208 , a protrusion (not shown) which pushes or depresses the panel open/closed detection switch 211 may be provided on the liquid crystal panel 208 such that the protrusion depresses the panel open/closed detection switch 211 when the liquid crystal panel 208 is closed, and the depression of the panel open/closed detection switch 211 by the above protrusion is released when the liquid crystal panel 208 is open. This enables the control system to recognize the open/closed status of the liquid crystal panel 208 .
  • the group of operating switches 207 are arranged at such a location that they cannot be operated with the liquid crystal panel 208 closed. The details of the switches included in the group of operating switches 207 will be described later.
  • the internal configuration of the video camera 100 will be described below with reference to FIG. 1 .
  • the video camera 100 is comprised of a microcomputer 107 which controls the entire system including a recording system and a reproducing system.
  • the microcomputer 107 is comprised of a ROM storing control programs, a RAM, and a CPU.
  • the recording system has a lens unit 101 included in the image pickup section 202 , and a microphone unit 104 including the microphone 203 .
  • the lens unit 101 is comprised of a group of fixed lenses for condensing light, a group of magnification varying lenses, a diaphragm, and a group of compensation lenses having both a function of compensating an image forming position moved with the movement of the magnification varying lenses and a function of carrying out focusing.
  • An object image is eventually formed on the imaging plane of a CCD (Charge Coupled Device) 102 by the lens unit 101 composed of these groups of lenses.
  • CCD Charge Coupled Device
  • the CCD 102 converts the image information of the object image as a light image formed on the imaging plane into electric charge to generate an image signal.
  • the image signal from the CCD 102 is inputted to a signal processing section 103 , then the signal processing section 103 carries out predetermined processing on the input image signal and outputs the resulting digital image data.
  • the microphone unit 104 is comprised of an amplifier for amplifying an audio signal captured through the microphone 203 , a band limit filter, an A/D converter, etc. and outputs digital audio data.
  • the digital audio data from the microphone unit 104 is inputted to a compressing section 105 together with the digital image data from the camera signal processing section 103 .
  • the compressing section 105 carries out MPEG compression-coding processing on the digital image data and digital audio data in real time and outputs a coded data in which the coded image data and coded audio data are multiplexed.
  • the coded data row outputted from the compressing section 105 is written into a disk 108 which is a randomly accessible magnetic optical disk by a disk control section 106 .
  • the disk control section 106 controls the write and read of coded data rows to and from the disk 108 .
  • the reproducing system has an expanding section 109 which performs reproduction, i.e., decoding the coded data rows read from the disk 108 through the disk control section 106 to expand the information amount and to convert them into image data and audio data, and outputs the reproduced image data to an image input selecting switch 111 and the reproduced audio data to a speaker unit 114 , respectively.
  • the image input selecting switch 111 selects and outputs either digital image data from the camera signal processing section 103 or image data (reproduced image data) from the expanding section 109 , or both of them under the control of the microcomputer 107 .
  • the image input selecting switch 111 has two-channel outputs corresponding to the EVF 204 and the liquid crystal panel 208 , and is capable of separately controlling the image data to be outputted to each of the channels. This enables the image data from the camera signal processing section 103 to be displayed on the EVF 204 and on the liquid crystal panel 208 separately and concurrently, or allows the image data (reproduced image data) from the expanding section 109 to be displayed on the liquid crystal panel 208 while the image data from the camera signal processing section 103 is being displayed on the EVF 204 .
  • the EVF 204 and the liquid crystal panel 208 have separate power supplies from each other and are capable of turning on and off the power independent of the entire system under the control of the microcomputer 107 . Also, the open/closed status of the liquid crystal panel 208 is recognized by the microcomputer 107 based on the detection signal from the panel open/closed detection switch 211 .
  • the speaker unit 114 which is comprised of a speaker 209 and an external output terminal 213 , receives audio data from the expanding section 109 when the coded data rows from the disk 108 are reproduced, drives the speaker 209 to output the audio data as sound, and outputs the audio data through the external output terminal 213 .
  • the speaker unit 114 has a capability of varying the volume under the control of the microcomputer 107 .
  • Signals from each of the operating switches 207 , the trigger switch 205 and the mode dial 206 are inputted to the microcomputer 107 .
  • the microcomputer 107 performs the control of the entire system of the video camera 100 as well as processing on individual components based on these signals.
  • the group of operating switches 207 includes a set key 115 a for determining and operating an item selected on the menu and others, a plus key 115 b and a minus key 115 c for selecting one from a plurality of options on the menu and others, an index key 115 d for displaying an index screen on the liquid crystal panel 208 , and a camera-mode reproduction key 115 e for reproducing coded data rows recorded on the disk 108 in camera mode.
  • the mode dial 206 is a switch for selecting a mode from the reproduction, camera and off modes
  • the trigger switch 205 is a switch for generating a recording start/stop event every time it is operated in camera mode as well as generating a recording start/stop event every time it is operated in reproduction mode.
  • an index screen 301 indicating the recorded image data stored in the disk 108 appears on the screen of the liquid crystal panel 208 .
  • the index screen 301 displays thumbnail images 303 to 308 corresponding, respectively, to a plurality of video clips recorded on the disk 108 .
  • One video clip described herein means a group of coded data rows from the start of recording prompted by an operation of the trigger switch 205 to the completion of recording by another operation of the trigger switch 205 when shooting is performed, and thus forms a basic unit (file) to be recorded on the disk 108 .
  • thumbnail image corresponding to a video clip is a representative picture representing the video clip, such as an initial image taken at the beginning of recording and reduced properly in size.
  • numbers “13” to “18” are displayed as simplified indications of the thumbnail images 303 through 308 representing the respective video clips.
  • the index screen 301 displays a cursor 309 which can be moved on the screen by operating the plus key 115 b and the minus key 115 c .
  • the cursor 309 can be moved to select a index image corresponding to a desired video clip out of the thumbnail images 303 to 308 corresponding to the respective the video clips.
  • FIG. 4 shows a screen status where the thumbnail image 305 is selected by the cursor 309 . Also displayed on the index screen 301 is video clip information 302 as information on the video clip corresponding to the selected thumbnail image 305 .
  • the information displayed in the upper row of the video clip information 302 includes information indicating where the currently selected video clip is found among all the video clips recorded on the disk 108 by predetermined sorting.
  • FIG. 4 shows the video clip corresponding to the selected thumbnail image 305 is found 15th out of the 30 video clips recorded on the disk 108 .
  • the predetermined sorting means a sort by the recorded time, by name, etc.
  • the name or part of the name of the video clip corresponding to the thumbnail image 305 “ABCD0015” is displayed.
  • the name is given according to predetermined rules such as DCF (Design Rule for Camera File System) established by Japan Electronic Industries Development Association, and can uniquely specify any one of the video clips recorded on the disk 108 .
  • DCF Design Rule for Camera File System
  • the index screen 301 also includes a slider 310 and a pointer 311 which provide an image indicative of where the video clips corresponding to the currently indicated thumbnail image 303 to 308 is located on the entire index screen 301 .
  • a variety of information may be displayed including remaining battery power capacity, whether the disk 108 is loaded, and so on, on the index screen 301 .
  • the cursor 309 moves toward the thumbnail images 306 , 307 each time the plus key 115 b is operated and moves toward the thumbnails 304 , 303 each time the minus key 115 c is operated.
  • the indication of the video clip information 302 and the position of the pointer 311 change with the movement of the cursor 309 .
  • the cursor 309 is moved to select a thumbnail image corresponding to a video clip before the thumbnail image 303 or after the thumbnail image 308 , the screen scrolls.
  • the switching of the display screen as described above is fully controlled by the microcomputer 107 .
  • this series of functions of displaying the index screen 301 and selecting and reproducing a desired video clip can be achieved not only in reproduction mode but also in camera mode, the image data from the disk 108 can be reproduced and displayed even while image data signals from the image pickup section 202 and audio data signals from the microphone unit 104 are being recorded without interrupting the recording operation.
  • the operating switches 207 are disposed such that they cannot be operated when the liquid crystal panel 208 is closed, the reproduction during recording is enabled only when the liquid crystal panel 208 is open.
  • FIG. 5 and FIG. 6 are flow charts illustrating a procedure performed by the microcomputer 107 in camera mode.
  • the first embodiment it is possible to reproduce coded data stored at random locations on the disk 108 during shooting. Further, to reproduce the coded data during shooting, it is controlled such that an image representing the image data obtained from the image pickup section 202 and currently being recorded is displayed on the EVF 204 , and an image representing the image data reproduced from the disk 108 is displayed on the liquid crystal panel 208 , respectively,.
  • the liquid crystal panel 208 is open for the image data from the disk 108 to be reproduced during shooting. This is because the operating switches 207 are arranged at such a location that they cannot be operated when the liquid crystal panel 208 is closed.
  • the user first selects the camera mode using the mode dial 206 and folds out the liquid crystal panel 208 . Then, the microcomputer 107 recognizes that the liquid crystal panel 208 is open, based on the detection signal from the panel open/closed detection switch 211 , powers off the EVF 204 and powers on the liquid crystal panel 208 . In addition, the microcomputer 107 controls the image input selecting switch 111 to select the camera image signal for both of the two channels and provides the image signal to the EVF 204 and the liquid crystal panel 208 .
  • the microcomputer 107 first monitors the operation of the trigger switch 205 in step S 101 , and when the trigger switch 205 is thus operated, determines that start of recording has been requested and starts recording in step S 102 . Then, it is determined whether the camera-mode reproduction key 115 e has been operated, or pressed, in step S 103 .
  • step S 104 the image input selecting switch 111 is controlled to switch the display images of the EVF 204 and the liquid crystal panel 208 such that the image data (captured image) from the camera signal processing section 103 is fed to the EVF 204 and the image data (reproduced image) from the expanding section 109 is fed to the liquid crystal panel 208 , and then the power of the EVF 204 is turned on in step S 105 .
  • step S 106 the speaker 209 of the speaker unit 114 is turned off so that no sound of the audio data reproduced from the disk 108 will be outputted. Turning off the speaker 209 impedes the reproduced sound from being outputted to the outside and hence can prevent the reproduced sound from being picked up by the microphone 104 and recorded. Although the speaker 209 is thus turned off, the external output terminal 213 included in the speaker unit 114 is held in a state that the reproduced sound is ready for outputting through the terminal 213 . Therefore, the user can listen to the reproduced sound by connecting headphones or the like to the external output terminal 213 .
  • step S 107 the reproduction of the coded data row is carried out starting with the coded data row recorded a predetermined time period earlier than the present time.
  • the reproduction is started with the coded data row recorded ten seconds earlier than the present time and stopped after reproducing for ten seconds.
  • the image according to the reproduced image data is displayed on the liquid crystal panel 208 and the reproduced audio data is outputted to the external output terminal 213 as described above.
  • the image according to the image data obtained from the image pickup section 202 is displayed on the EVF 204 .
  • step S 108 completion of the reproduction is waited for, and after the reproduction is completed, the process proceeds to step S 109 .
  • step S 109 the image input selecting switch 111 is controlled to switch the display status so that the image data from the camera signal processing section 103 is fed to the liquid crystal panel 208 to be displayed thereon, and then in the following step S 110 , the power of the EVF 204 is turned off. Then in step S 111 , it is determined whether the trigger switch 205 has been operated, or depressed.
  • the process goes back to the step S 103 to get ready for the next request for reproduction (depression of the camera-mode reproduction key 115 e or the index key 115 d ) while continuing recording. If the trigger switch 205 has been operated, it is determined that termination of recording has been requested, and then the termination of recording is performed in step S 112 , and then the process returns to the step S 101 to prepare for the next instruction for recording.
  • step S 103 the process proceeds to step S 113 shown in FIG. 6 , where it is determined whether the index key 115 d has been operated, or depressed.
  • step S 114 the image input selecting switch 111 is controlled to switch the display images of the EVF 204 and the liquid crystal panel 208 so that the image data from the camera signal processing section 103 is fed to the EVF 204 to be displayed thereon and the image data from the expanding section 109 is fed to the liquid crystal panel 208 to be displayed thereon, and then in step S 115 the power of the EVF 204 is turned on. Then in step S 116 , the speaker 209 of the speaker unit 114 is turned off to inhibit the output of the reproduced sound so that the reproduced sound cannot be picked up by the microphone unit 104 .
  • step S 117 the disk control section 106 is controlled to reproduce the thumbnail image data of each of the video clips recorded in the predetermined recording area of the disk 108 , process the thumbnail image data in the expanding section 109 and display an index screen similar to that shown in FIG. 4 on the liquid crystal panel 208 .
  • step S 118 selection of a thumbnail image corresponding to the video clip to be reproduced on the index screen is waited for, and when the thumbnail image corresponding to the video clip is chosen, the process proceeds to step S 119 .
  • step S 119 the disk control section 106 is controlled to start reproducing the video clip corresponding to the selected thumbnail image from the disk 108 in parallel with recording.
  • step S 120 completion of the reproduction of the video clip corresponding to the selected thumbnail image is waited for. Controlling in this way allows a video clip corresponding to a thumbnail image selected on the index screen and being reproduced to be displayed on the liquid crystal panel 208 in parallel with shooting.
  • the process returns to the step S 109 .
  • step S 113 If the index key 115 d is not operated in the step S 113 , the process returns to the step S 111 .
  • the operator can reproduce the scene in which the unidentified object appears and easily confirm what the unidentified object is by depressing the camera-mode reproduction key 115 e without interrupting recording.
  • the user can also playback a video clip taken before, which includes similar scenes, and can therefore carrying out shooting while comparing the reproduced picture with the picture being recorded.
  • FIG. 7 is a block diagram depicting the internal configuration of a video camera 100 according to the second embodiment
  • FIG. 8 is a diagram showing a state transition of display control when a reproduction request is issued in camera mode in the video camera 100 of FIG. 7
  • FIG. 9 is a flow chart showing a procedure carried out in camera mode in the video camera 100 of FIG. 7 .
  • blocks and component parts corresponding to those in FIG. 1 are designated by identical reference numerals.
  • the video camera 100 according to the second embodiment is distinguished from the video camera 100 according to the first embodiment in FIG. 1 in that there are additionally provided an infrared remote control unit 520 that controls the video camera 100 using infrared ray as transmitting medium and an infrared signal receiving section 521 that receives a infrared (IR) signal from the infrared remote control unit 520 and generates a corresponding control code.
  • the control code generated by the infrared signal receiving section 521 is inputted to the microcomputer 107 .
  • the infrared remote control unit 520 has all keys corresponding to the operating keys provided in the main body of the video camera 201 except for the mode dial 206 . Therefore, unlike the first embodiment, when recording is in progress with the liquid crystal panel 208 closed, it is possible that reproduction of the image data is requested in parallel with recording by operating keys 520 e or 520 d in the infrared remote control unit 520 , which corresponds to the camera-mode reproduction key 115 e or the index key 115 d.
  • the microcomputer 107 inhibits the operation of the corresponding key 520 d or 520 e in the infrared remote control unit 520 from being accepted.
  • the camera mode includes a standby state 801 , in which no shooting (recording) is performed, and a shooting state 804 , in which a captured image is being recorded, as shown in FIG. 8 .
  • Transition from the standby state 801 to the shooting state 804 is triggered by an instruction to start shooting, and transition from the shooting state 804 to the standby state 801 is triggered by an instruction to stop shooting.
  • the standby state 801 includes a state 802 in which the liquid crystal panel 208 is open, and a state 803 in which the liquid crystal panel 208 is closed, while the shooting state 804 also includes a state 805 in which the liquid crystal panel is open, and a state 806 in which the liquid crystal panel is closed.
  • the microcomputer 107 controls the image input selecting switch 111 so that, in the standby state 801 , image data obtained by the image pickup section 202 is fed to the liquid crystal panel 208 to be displayed thereon when the liquid crystal panel 208 is open while image data obtained by the image pickup section 202 is fed to an EVF 204 to be displayed thereon when the liquid crystal panel 208 is closed.
  • the second embodiment is not intended to reproduce the coded data rows from the disk 108 in the standby state 801 , and in the standby state 801 , the microcomputer 107 disables the operation of the camera-mode reproduction key 115 e or the index key 115 d , or the operation of the key 520 e or the key 520 d corresponding thereto in the infrared remote control unit 520 .
  • the microcomputer 107 inhibits the operation of the keys 520 d and 520 e in the infrared remote control unit 520 from being accepted so that the coded data row from the disk 108 cannot be reproduced in parallel with recording. Further, the microcomputer 107 controls the image input selecting switch 111 to feed the EVF 204 with image data from the image pickup section 202 to display the same as well as display on the EVF 204 a message stating that the operation of the keys 520 d and 520 e should not be accepted.
  • the microcomputer 107 allows the acceptance of the operation of the keys 520 d and 520 e in the infrared remote control unit 520 . Therefore, the coded data row from the disk 108 can be reproduced in parallel with recording.
  • the microcomputer 107 controls the image input selecting switch 111 , as is the case with the first embodiment, such that when recording alone is being carried out, the image data obtained by the image pickup section 202 is fed to the liquid crystal panel 208 to be displayed thereon, and image data from the image pickup section 202 is fed to the EVF 104 , while when the coded data row is reproduced in parallel with recording, image data from the image pickup section 202 is fed to the EVF 204 and the reproduced image data is fed to the liquid crystal display 208 to be displayed thereon.
  • FIG. 9 is a flow chart showing the operation of the microcomputer 107 in camera mode.
  • step S 201 the operation of the trigger switch 205 is monitored, and if the trigger switch 205 is operated, it is determined that start of recording has been requested, and the process proceeds to step S 202 , where recording is started.
  • step S 203 it is determined whether the liquid crystal panel 208 is open, based on the detection signal from the panel open/closed detection switch 211 . If the liquid crystal panel 208 is not determined to be open, or the liquid crystal panel 208 is closed, the process proceeds to step S 204 , where the operations of keys 520 d and 520 e in the infrared remote control unit 520 are inhibited from being accepted. The inhibition of the acceptance of the 520 d and 520 e key operations in the infrared remote control unit 520 further inhibits the reproduction of the coded data row in concurrence with recording with the liquid crystal panel 208 closed.
  • step S 205 the operation of the trigger switch 205 is waited for to instruct termination of recording, and if the trigger switch 205 is operated, a procedure for termination of recording is carried out. Then, the process returns to step S 201 to get ready for the next start of recording.
  • the image input selecting switch 111 is controlled to cause both of the two channels to select and output image data from the camera signal processing section 103 .
  • the description of the procedure after this will be omitted since it will follow the identical procedure to the procedure from the step S 103 onward shown in the flow chart of FIG. 5 in the first embodiment.
  • reproduction in concurrence with recording can be achieved by operating the index key 115 d , the camera-mode reproduction key 115 e , or the switch 520 d or 520 e in the infrared remote control unit 520 (the keys corresponding to the index key 115 d or the camera-mode reproduction key 115 e in the infrared remote control unit 520 ).
  • FIG. 10 is a flow chart showing a control procedure of the microcomputer 107 in reproduction mode of the video camera according to the third embodiment.
  • image data from the image pickup section 202 and audio data from the microphone unit 104 can be recorded concurrently with reproduction of coded data row from the disk 108 during the reproducing operation of the coded data row.
  • the image input selecting switch 111 is controlled to switch images to be displayed so as to feed the image data from the image pickup section 202 to the EVF 204 to display the same and feed the reproduced image data to the liquid crystal panel 208 to display the same, as well as turn off the speaker to inhibit the reproduced audio sound from being outputted.
  • the reproduction mode is selected using the mode dial 206 , and the liquid crystal panel 208 is folded out.
  • the microcomputer 107 recognizes that the liquid crystal panel 208 has been opened, based on the detection signal from the panel open/closed detection switch 211 , turns off the power of the EVF 204 and turns on the power of the liquid crystal panel 208 .
  • the microcomputer also controls the input image selecting switch 111 to feed the reproduced image data to the liquid crystal panel 208 to display the same.
  • step S 301 the operation of the index key 115 d is monitored, and if the index key 115 d is operated, or depressed, the process proceeds to step S 302 .
  • the disk control section 106 is controlled to reproduce index image data from the disk 108 , process the index image data through the expanding section 109 , and feed the processed data to the liquid crystal panel 208 to display an index screen image as shown in FIG. 4 .
  • step S 303 selection of a thumbnail image corresponding to the video clip to be reproduced on the index screen is waited for, and when the thumbnail image corresponding to the video clip is selected, the process proceeds to step S 304 .
  • step S 304 the disk control section 106 is controlled to start reproducing the video clip corresponding to the selected thumbnail image.
  • the reproduced image data is also fed to the liquid crystal panel 208 to be displayed thereon.
  • step S 305 it is determined whether the trigger switch 205 has been operated, or depressed. If the trigger switch 305 has been operated, it is determined that start of recording has been requested, and the process proceeds to step S 306 , where the image input selecting switch 111 is controlled to switch images to be displayed so as to feed the image data from the camera signal processing section 103 to the EVF 204 to display the same while continuing to display the reproduced image on the liquid crystal panel 208 .
  • step S 307 the EVF 204 is turned on. Then in step S 308 , the speaker 209 of the speaker unit 114 is turned off to inhibit the reproduced sound from being recorded. At this time, the reproduced audio data is outputted through the external output terminal 213 of the speaker unit 114 .
  • step S 309 recording is started in parallel with the reproduction of the video clip corresponding to the selected thumbnail image.
  • the image data obtained by the image pickup section 202 is fed to the EVF 204 to be displayed thereon and the reproduced image is displayed on the liquid crystal panel 208 .
  • This permits recording of image data and audio data to be performed while viewing a reproduced image to thereby enable the user to confirm the object image being recorded.
  • step 310 it is determined whether the recording operation has been completed. This determination is made based on whether the trigger switch 205 has been operated.
  • the process proceeds to step S 311 , where the image input selecting switch 111 is controlled to stop supplying the EVF 204 with the image data from the camera signal processing section 103 while continuing to allow the reproduced image to be displayed on the liquid crystal panel 208 , and then the power of the EVF 204 is turned off in step S 312 .
  • step S 313 it is determined that the recording operation has been completed and there is no reproduced sound to be recorded, and then the speaker 209 of the speaker unit 114 is turned on to output the reproduced audio data.
  • step S 314 it is determined whether the reproduction of the selected video clip has been completed, and if the reproduction has not been completed yet, the process goes back to the step S 305 to prepare for the next recording. On the other hand, if the reproduction has been completed, the process returns to the step S 301 to prepare for the next reproduction.
  • step S 310 If in the step S 310 , it is determined that the recording has not been completed yet, the process proceeds to step S 315 , where it is determined whether the reproduction has been completed, and if the reproduction is not complete, the process returns to the step S 310 . On the other hand, when the reproduction of the video clip is completed, the flow goes to step S 316 , where completion of the recording is waited for. When the recording is completed, the process proceeds to the step S 311 , where feeding of the image data from the camera signal processing section 103 to the EVF 204 is stopped, the power of the EVF 204 is turned off, and the power of the speaker 209 of the speaker unit 114 is also turned on.
  • step S 305 it is determined that the trigger switch 205 has not been operated, the process goes to the step S 314 .
  • the present embodiment it is designed such that image data and audio data are recorded while a reproducing operation is performed in response to an instruction to start recording during reproduction of coded data row from the disk 108 .
  • a desired object appears during reproduction of a video clip stored in the disk 108 when the user is checking the contents being reproduced, the desired object can be captured and recorded immediately without interrupting the reproduction.
  • the output of the reproduced sound from the speaker 209 is inhibited in response to the recording instruction, even if sound is recorded during the reproducing operation, it can be avoided that the reproduced sound is recorded by accident.
  • the present invention can also be achieved by supplying an apparatus with a storage medium storing software program code for performing the functions of each of the above described embodiments (inclusive of the flow charts shown in FIG. 5 , FIG. 6 , FIG. 9 and FIG. 10 ), causing a computer (or CPU or MPU) of the apparatus to read and execute the program code stored in the storage medium.
  • the program code itself read out from the storage medium realizes the functions of the above described embodiments, and the storage medium storing the program code constitutes the present invention.
  • the storage medium for recording the program code may be a floppy (registered trademark) disk, a hard disk, an optical memory disk, a magneto-optical disk, a CD-ROM, a CD-R, a DVD-ROM, a magnetic tape, a nonvolatile memory card, or a ROM, for instance.

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US20100171860A1 (en) 2010-07-08
US8520119B2 (en) 2013-08-27
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US20050225652A1 (en) 2005-10-13
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US20120287324A1 (en) 2012-11-15
US8218056B2 (en) 2012-07-10

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